Yes, a single UPS that has two power inputs (PDU_A & PDU_B) would work in the same manner, provided that the single UPS is rated to meet the requirements of the full load of the Array (and any other HW you are attaching to the UPS).

The suggestions that were used in this thread were only in regards to the original post question to use a 2 UPS model. Since there are UPS’s on the market that have multi PDU capability, than a single UPS with this option is just as good as having multiple UPS’s (I would guess that it would be easier to manage/maintain in the long run too).

-joe

-Joe

Social Media and Community Professional#IWork4DellGet Support on Twitter - @dellcarespro

You would need either a third UPS or incorporate an ATS (Automatic Transfer Switch).

If using a third UPS you would be faced with the problem of “where do I plug the third UPS into” since most data centers usually only have two separate circuits. If this is the case, you could use an Automatic Transfer Switch (ATS).

The ATS basically has two power cords and some outlets, and you plug it into two power sources; if one source fails the ATS switches to the other one so the outlets remain powered.

If you are limited to only two UPS’s, other customers have used the ATS with success (although it’s not officially tested or endorsed by Dell). You can configure the two UPS and an ATC as follows:

Connect the ATC two power cords to UPS1 and UPS1, than connect the Array PS0 to UPS1, PS1 to the ATC, and PS2 to UPS2 (the ATC spans both UPSs, and only one PS is connected to it). Note that this would require that a single UPS can carry the full load of the array (two PS’s)

If you are going to purchase a third UPS, but still only have two circuits, then the configuration would be different, where the ATC would span C1 and C1, and UPS 1 is in C1, UPS2 is attached to the ATS, and UPS3 is in C2, which each PS plugged into a separate UPS. This would be preferred over the two UPS option.

Ideally, you would have three circuits and three UPS's

For sizing of the ATC, each PS of the PS6510:

Input voltage: 100 to 240 VAC (auto-sensing)

440 watts DC output

Maximum input power: 0.7 KVA

Input current: 7 – 3.5A

-joe

-Joe

Social Media and Community Professional#IWork4DellGet Support on Twitter - @dellcarespro

Yes, a single UPS that has two power inputs (PDU_A & PDU_B) would work in the same manner, provided that the single UPS is rated to meet the requirements of the full load of the Array (and any other HW you are attaching to the UPS).

The suggestions that were used in this thread were only in regards to the original post question to use a 2 UPS model. Since there are UPS’s on the market that have multi PDU capability, than a single UPS with this option is just as good as having multiple UPS’s (I would guess that it would be easier to manage/maintain in the long run too).

-joe

-Joe

Social Media and Community Professional#IWork4DellGet Support on Twitter - @dellcarespro